To most of us, time feels as solid as the phone alarm that drags us out of bed or the calendar that fills up faster than we ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

Scientists could soon test Einstein's theory of general relativity by measuring the distortion of time. General relativity states that gravity is the result of mass warping the fabric of space and ...

We experience the flow of time because it’s a natural outcome of the basic laws of physics. But we may need to build a whole ...

A new software package detailed by Chinese scientists promises to tell what time it is on the moon, accounting for effects of relativity.

For those who watch gravitational waves roll in from the universe, GW250114 is a big one. It's the clearest gravitational ...

In the gloomy days of January, time seems to drag. According to the Einstein theory of relativity, it actually does—in a minute amount that means little to anyone except a scientist. During its annual ...